BS EN 28167:1992 PDF

1   Scope This International Standard specifies the characteristics and dimensions of projections for resistance welding; it also includes the appropriate design and dimensions for tools (see Annex B) The projections may be used on either hot-rolled or cold-rolled, uncoated mild steel, of conventional welding quality and up to 3 mm thick, as single projections, in multiples or as a group of multiples.